Alarm-thermometer.



A. BANHART.-

ALARM THERMOMETER.

APPLICATION FILED MAR. 1, 1910.

Patented Ma 16, 1911.

7 31 1 nan 044 40/ /71 nn'rTnn sTaTns raTnnT orrron ALBERT BANHART, OF OBEBNDORF-ON-THE-NECKAR, GERMANY, ASSIGNOR TO JULIUS BANHART, OF HUTCHINSDN, KANSAS.

ALARM-THERMOMETER.

- v Specification of Letters Patent.

Patented May 16, 1911.

Application filed March 1, 1910. Serial No. 546,608.

- the following is a specification.

My invention relates to a device adapted to be employed when heating or boiling flulds or the like, so that an alarm will be given when the liquid reaches a certain de-' moved.

gree of temperature. 7

An lmportant obgect of my invention is to provide a device of the above character which may be adjusted tooperatc at diii en ent heat temperatures.

A further object of my invention. is to provide a device of the above character, which will be simple in construction and not liable to get out of order.

Myinvention consists generally in the arrangement and combination of parts to be hereinafter described.

In the accompanying drawings, forming a part of this specification, and in which like numerals are employed to designate like parts throughout the same, Figure 1 is a vertical longitudinal section through the device. Fig. 2 isa side elevation of the device. Fig. .3 is a top plan View of the same. Fig. 4C is a side View of the spring motor re- In the drawings illustrating a preferred embodiment of my invention 1 designates a casing,which forms the body portion of the device and which may be preferably eylindrical. The lower end of the casing 1 is closed as at 2, and this closed end ,2 is provided with an opening 3,. which is normally closed by means of a removable screw 1. The casing l has rigidly connected thereto nearits upper end as at 5, a bracket 6,

which extends downwarly in spaced relation to said casing l. The bracket 6 is provided with a portion 9, as illustrated.

In the use'ofthe device, the casing 1 is placed within the receptacle, which contains the liquid to be heated, and the lower end of the casing 1 is submerged. within said liquid. The loracketfi together with the portio-nt) is arranged upon the edge of the receptacle,

and supports the casing 1. The upper end of the casing 1, is formed open, and is closed by means of a cap 9', which 18 removable from the casing 1, said cap 9 being locked to the casing 1 by means of screws 9*, or the like.

The cap 9 is provided centrally thereof with a screw-threaded opening 10, for the reception of an usting screw 11, the lower end of which is formed plane as at 12, and rotatably mounted within the upper portion of a bracket 13. The lower end of the screw 11 is enlarged as at 1.8, and this construction prevents said screw 11 from being separated from the bracket 13. From the construction above described, it is obvious that the bracket 13 is suspended from the adjusting screw 11, and that said bracket 13 may be adjusted vcrticallyby rotating the screw 11. The bracket 13 is shown as being substantially rectangular, and said bracket 13 has rotatably mounted therethrough near its center, a shaft 1 1, which extends laterally beyond said bracket 18 and has its ends disposed within longitudinally arranged slots 15 formed at diametrically opposite points upon the casing 1. One end of the shaft 14 is provided with a handle 16, whereby said shaft may be rotated for a purpose to be hereinafter apparent. Upon theshaft 1a, is loosely mounted a pinion 17, upon one side .of which is arranged a ratchet-wheel 18,

which is rigidly mounted upon the shaft 14-.

' The loose pinion 17 is provided with a pawl 19, pivotally connected thereto as at 20, and disposed to engage the ratchet-wheel 18. The pawl 19 is kept in engagement with the ratchet-wheel 18, by means of a bow-spring 21, mounted upon the loose pinion 17. Upon the other. side of the pinion 17 is arranged a coil spring 22, which is wound about the shaft 1d and adapted to rotate the same when unwinding. One end of the coil spring 22 is fixedly secured to the shaft 14 and the opposite end of the same is connected to a shaft 23, which is mounted through the sides of the bracket 13. The shaft 23 is disposed in vertical alinement with shaft 14, and

upon said shaft 23, is rotatably mounted a relatively small pinion 2%, arranged to mesh with the pinion 17.

An cscapcn'ientwheel 25 is rotatably mounted upon the shaft 23, and rigidly connected to the pinion 24. Below the shaft 523 is arranged a shaft 26, which is pivotally mounted upon the bracket 13. Rigidly mounted upon the shaft 26, is an escapement 27 comprising pallets 28 and 29 which alteran annular llanee 35, the plate ll; toget her with the llange 33 being immovable. Below the plate 53 the rod Elias l'lglell; seeuredthereto a knob 1(3. whieh dispos d above a diaphrz gm 3T spanning the lower portion of the easing l and seeureiil thereto b any suitable n'nans. The space below the diaphragm 37 is partially ,lilled with an aleohol-benzin, whirl] readily eonverted into a apor when subieeted to heat. lit will thus be seen that when the de iee. placed within the liquid to be boiled. and properl adjusted the gasi'l'ying of the. aleohol-lu-nzin will pro-- due-e a pri tsure wlierelrv the diaphragn'i 37 will be raised, whieh in turn will raise. the rod 3'2. Thisnmven'ient of rod 32 will release the pin jtland allow the apemen-t wheel I) to rotate. After the deviee hasloeen removed 'l'ronthe hot liquid and the {pressure below the diaphragn'i accordingly reduced, the hooked end of the rod 32 is l'etii'u'ned to i I: ei'igg agement with the pin 30 by means o'l an expansible coil spring whirh surrounds: the-rod 3'2.

Arrangeel outside ol the ea in l and no the upper end thereo'l' is a suitable eon whieh iseonneeted to the braekel. (3 by in ol. the strip l l. and to the rapb by n'nans of astrip l1. The ea ing l is provided adz: eent the gong Sf). with an openinp' witlr in whieh operates a striker lithxedlv eured upon an oseillatory rod ll, whieh in turn is fixedly mounted upon the shal't 26.

whereby said rod ll is osrillaled and th striker l t will inlerinitlenllv engage the gong Iii). Alter the pressure below the diaphragm 3T l'alls, the spring l'lwill return rod 32 to its normal position and the eseapement wheel prevent d lron'i turning it ity is de ired to have th 9 alarm given he tore the liquid being heated rearhes (:entig'rade, the braeket l3 lowered by rotating; the adjusting serew 'l'l as above deserihed, and the rod 23; will be removed from u iuin the pin 30 by a shorter movement than l ie'l'ore. :lt obvious that the bracket 1 may he raised. wlierebv the device will not give an alarm until the temperature of tho i liquiill being; heattal exeeeds ltltl eentigrade. it i to be understood that the spring 22 may be wound up l) rotating the shall 14 clockwise. i

Having full described my invention, I claim.

l. in a deviee ot' the eharaeter described, a easing, a trame longitudinally movably mounted within said e sing a srrew lor moving said l rame. a spring motor arranged {within said frame, eoinpi "ne' a train gears and an eseapement, a striker attached to said eseapenient, a gong to cooperate with the striker, a movable rod to engage said said led and err-- said easmounted within the easing below and adapted to engage the same. pansible material disposed within in; below llexibl; diaphragm.

in a device of the character described, a tubular easing, a lrame'longitiulinally movably mounted within said easing, a s row for moving said frame, a spring motor arranged within said frame, comprising a plurality of shafts journaled thr ugh said 'li'anie, eoiiperatint;- gears and an e eapement ('tlllllt 'tttl to said shatts, said ea. e being pr "ided with longitudinally extending slots. one of said shafts extending beyond the frame to operate within said slots, whereby said l rame guided in its longitudinal movemenha movable rod provided with nu'ai'is to engage P aid eseapement, a llexible diaphragm arranged within said easing to engage said rod. expansible mate rial arranged below said diapln'amn to raise the same when sulrieel'ed to heat, a, striker eonneeted to said ese peinent, and a gone to cooperate with the striker.

it. in a devtee ol the eharaeler described,

a easing, a frame longitiulinallv movably mounted within said easing, a screw for moving said Frame, a spring motor arranged within said 'l rame. 'onqn'isine a plural it v ol sha'l'ls journaled through said 'l'raine, eooperating gears and an esmpem nt eonmated to said shal'ts. said casing being provided with longitudinallv extending slots, one of said shal'ls exlendine beyond the l'rame to operate within said slots, whereby .Jaid lrame is guided in its longitudinal movemenh a movable rod provided with nu-ans lo t'llf l jt. said esrapoment. a s u'ing to normally hold said rod in its lowermost position, a llexible diaphragm arranged within said easing to vin age said rod, rX- pansible. material arranged below'said dia- (\eapen'uait, i l'lexible diaphragm suitably" phragm to raise the same wh n subjectedll-S to heat, a striker connected to said escapement, and a gong to cooperate with the striker.

4. In a device of the character described, a casing, a motor mounted within said casing, means to move said motor longitudinally of said casing, an alarm device to be actuated by the motor, a movable rod to control the action of the motor, a flexible diaphragm mounted within the casing to engage the rod, and expansible material disposed within said casing below said diaphragm.

5. In a device of the character described, a casing, a frame longitudinally movably mounted therein, means to effect the movementof said frame, a motor arranged within the frame, comprising a train of and an escapement, a striker attached to said escapement, a gong to cooperate with the striker, a movable rod to engage said escapement, a flexible diaphragm suitably diaphragm mounted within said casing to engage the rod, and an expansible liquid disposed within saidmasingbelow said diaphragm.

In testimony whereof I affix my signature in presence of two witnesses.

ELEJBERT BANHART.

Yi itnesses Fnma .KLAIBER,' ERNEST ENTENMANN. 

